These two volumes of proceedings contain nine invited keynote papers and 130 contributed papers presented at the Third International Conference on Advances in Steel Structures (ICASS '02) held on 9-11 December 2002 in Hong Kong, China. The conference is a sequel to the First and the Second International Conferences on Advances in Steel Structures held in Hong Kong in December 1996 and 1999. The conference provides a forum for discussion and dissemination by researchers and designers of recent advances in the analysis, behaviour, design and construction of steel structures. Papers were contributed from over 18 countries around the world. They report current state-of-the art and point to future directions of structural steel research, covering a wide spectrum of topics including: beams and columns; connections; scaffolds and slender structures; cold-formed steel; composite construction; plates; shells; bridges; dynamics; impact mechanics; effects of welding; fatigue and fracture; fire performance; and analysis and design.